62. Which of the following is a brush border enzyme? a) dipeptidase b) enterokin
ID: 3483546 • Letter: 6
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62. Which of the following is a brush border enzyme? a) dipeptidase b) enterokinas se c trypsin d) chymotrypsin e)none of these 63. What structure blocks entry of food into the nasopharynx during swallowing? a) tongue b) epiglottis c) soft palate d) uvula 64. What function is performed by saliva? a) protection b) digestion elubrication d)b,c e)a, b, 65. Which substance is not secreted by the pancreas. a) alkaline buffer b) trypsinogen )chemotrypsinogen d enterokinase 66. What is intrinsic factor? a) brush border enzyme b) a lysozyme carrier c) a carrier protein d) a nutrient e) a, 67. Identify the cells that secrete pepsinogen. a) intestinal crypt cells b) gastric chief cells e) pancreatic acinar cells ) gastric parietal cells a) a proteaseb) a lipase ca carbohydrase d) an enzyme activator e) a,d a) oral cavity b) gastric walle) gastric lumen d) intestinal all 68 What is enterokinase? 69. Where can contact digestion occur? 70. Identify the compound that is zot an amphipathic molecule (an emulsifier) a) bile salt b) lecithin c) lipase 71. Which process describes segmentation? a) alternating contractions of the 2-layered muscularis externa that moves chyme forward and backward b) churning activity of the 3-layered muscularis externa that performs mechanical digestion c) sequential contractions of circular and longitudinal muscle that propels chyme in one direction 72. Which of the following is not part of a micelle? a) fatty acid b) triglyceride c) monoglyceride d) cholesterol e)lecithin 73. Why does sodium-linked transport of glucose require energy from ATP hydrolysis? a) glucose is pumped into the enterocyte through its apical membrane b) glucose is pumped out of the enterocyte through its apical membrane e) sodium is pumped out of the enterocyte through its basolateral membrane in exchange for potassiumExplanation / Answer
63 ) D uvula is the answer Usually during swallowing, the soft palate and uvula rise reflexively to close off the entrance to the nasopharynx.
64 ) B digestion The digestive functions of saliva include moistening food, and helping to create a food bolus, so it can be swallowed easily.
65 ) D is the answer enterokinase cannot be secreated by the pancreas
Enterokinase, also called Enteropeptidase, proteolytic enzyme, secreted from the duodenal mucosa, that changes the inactive pancreatic secretion trypsinogen into trypsin, one of the enzymes that digest proteins. Enterokinase is believed to be produced by the glands of Brunner in the membrane lining of the duodenum.
66 ) C is the answer Intrinsic Factor is a specialized transport protein
67 ) B is the answer Chief cells secrete pepsinogen
68 ) D is the answer is an enzyme activator enterokinase is the physiological activator of trypsinogen
69 ) A is the answer contact of saliva
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